Operating Instructions Thread tapping units/ Accessoriesr 01/09, Software 4.9
©
01.1994-2016 microtap GmbH
18
2.2.1. The automatic thread tapping machine has the following distinguishing features:
Height adjustment (column)
600 mm, 750 column, 1.000 mm
The machines can be equipped with different columns. Column 600 (standard
microtap II,) 750 mm (standard megatap II); the height of the work head is adjusted by
a hand crank after releasing the locating clamp. The work head can not be rotated
horizontally.
Operating lever with integrated start button
, for manual operation.
The operating lever has an adjustment provision for its length. It can also be
disengaged from the feed drive. This helps to prevent accidents when the machine is
operated with the pneumatic feed control (ZAP).
Floating (weight-balanced)
suspension of motor (work spindle).
The weight of the work spindle is equally balanced over its entire travel; the spindle
operation is by hand lever or pneumatic pressure. After the start of the cut, no force is
applied in the feed direction; the cutting tool advances into the workpiece solely by
virtue of its pitch. The return force on the operating head is adjustable.
The drive spindle
of the motor
is also the work spindle
,
which ensures a very quick reaction time to prevent tool fracture and permits an
accurate measurement of the applied torque.
The megatap II-G14/-G16 / jobtap G14 /-G16 includes a gearbox between the drive
motor and the work spindle.
Continuous monitoring of torque of drive motor;
The torque is limited to the value preset by the operator and is continuously indicated
on the operator display. The torque is monitored to prevent fracture of the tool, to
provide, for instance, a measure of tool quality and tool life, or indication whether
lubricant is needed or whether the selected cutting speed is correct, or whether the
hole is too large or too small.
Quick-change collet holder
(quick tool change system SWS) (see chapter tool
holder).
The machine is delivered with the chuck heat-shrunk to the spindle; it must not be
removed by the user, since this may damage the spindle bearing.
The quick-change inserts are sized to suit the diameter of the cutting tools. The
inserts do not retain the cutting tool rigidly but permit limited axial backlash. The
cutting tool is thus self-centering in the hole and can compensate positional deviation
approx. 0,1mm.
Control panel
(see chapter “operating machine”)
The control panel incorporates-a 4-line display, a sealed keyboard with 5 selector
buttons and a rotary knob
The ON/OFF selector switch
(only megatap II)
If the machine is in automatic mode (START AUTO Sz), the selector switch must be
set to “0” before attempting to change the tapping tool.
The screen displays the message “SAFETY STOP, MOTOR DISABLED”.
WARNING Risk of injury!
When the machine is in automatic mode, the spindle starts automatically when the
work head is advanced towards the workpiece.
